/*      $NetBSD: nca_pcmcia.c,v 1.24 2008/04/28 20:23:56 martin Exp $   */

/*-
 * Copyright (c) 2000, 2004 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nca_pcmcia.c,v 1.24 2008/04/28 20:23:56 martin Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/buf.h>

#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>

#include <dev/pcmcia/pcmciareg.h>
#include <dev/pcmcia/pcmciavar.h>
#include <dev/pcmcia/pcmciadevs.h>

#include <dev/ic/ncr5380reg.h>
#include <dev/ic/ncr5380var.h>
#include <dev/ic/ncr53c400reg.h>

struct nca_pcmcia_softc {
        struct ncr5380_softc    sc_ncr5380;     /* glue to MI code */

        /* PCMCIA-specific goo. */
        struct pcmcia_function *sc_pf;          /* our PCMCIA function */
        void *sc_ih;                            /* interrupt handler */

        int sc_state;
#define NCA_PCMCIA_ATTACHED     3
};

int     nca_pcmcia_match(device_t, cfdata_t, void *);
int     nca_pcmcia_validate_config(struct pcmcia_config_entry *);
void    nca_pcmcia_attach(device_t, device_t, void *);
int     nca_pcmcia_detach(device_t, int);
int     nca_pcmcia_enable(device_t, int);

CFATTACH_DECL_NEW(nca_pcmcia, sizeof(struct nca_pcmcia_softc),
    nca_pcmcia_match, nca_pcmcia_attach, nca_pcmcia_detach, NULL);

#define MIN_DMA_LEN 128

/* Options for disconnect/reselect, DMA, and interrupts. */
#define NCA_NO_DISCONNECT       0x00ff
#define NCA_NO_PARITY_CHK       0xff00

const struct pcmcia_product nca_pcmcia_products[] = {
        { PCMCIA_VENDOR_INVALID, PCMCIA_PRODUCT_INVALID,
          PCMCIA_CIS_INVALID },
};
const size_t nca_pcmcia_nproducts =
    __arraycount(nca_pcmcia_products);

int
nca_pcmcia_match(device_t parent,  cfdata_t cf, void *aux)
{
        struct pcmcia_attach_args *pa = aux;

        if (pcmcia_product_lookup(pa, nca_pcmcia_products, nca_pcmcia_nproducts,
            sizeof(nca_pcmcia_products[0]), NULL))
                return 1;
        return 0;
}

int
nca_pcmcia_validate_config(struct pcmcia_config_entry *cfe)
{

        if (cfe->iftype != PCMCIA_IFTYPE_IO ||
            cfe->num_memspace != 0 ||
            cfe->num_iospace != 1)
                return EINVAL;
        return 0;
}

void
nca_pcmcia_attach(device_t parent, device_t self, void *aux)
{
        struct nca_pcmcia_softc *esc = device_private(self);
        struct ncr5380_softc *sc = &esc->sc_ncr5380;
        struct pcmcia_attach_args *pa = aux;
        struct pcmcia_config_entry *cfe;
        struct pcmcia_function *pf = pa->pf;
        int flags;
        int error;

        sc->sc_dev = self;
        esc->sc_pf = pf;

        error = pcmcia_function_configure(pf, nca_pcmcia_validate_config);
        if (error) {
                aprint_error_dev(self, "configure failed, error=%d\n", error);
                return;
        }

        cfe = pf->cfe;
        sc->sc_regt = cfe->iospace[0].handle.iot;
        sc->sc_regh = cfe->iospace[0].handle.ioh;

        /* Initialize 5380 compatible register offsets. */
        sc->sci_r0 = C400_5380_REG_OFFSET + 0;
        sc->sci_r1 = C400_5380_REG_OFFSET + 1;
        sc->sci_r2 = C400_5380_REG_OFFSET + 2;
        sc->sci_r3 = C400_5380_REG_OFFSET + 3;
        sc->sci_r4 = C400_5380_REG_OFFSET + 4;
        sc->sci_r5 = C400_5380_REG_OFFSET + 5;
        sc->sci_r6 = C400_5380_REG_OFFSET + 6;
        sc->sci_r7 = C400_5380_REG_OFFSET + 7;

        sc->sc_rev = NCR_VARIANT_NCR53C400;

        /*
         * MD function pointers used by the MI code.
         */
        sc->sc_pio_out = ncr5380_pio_out;
        sc->sc_pio_in =  ncr5380_pio_in;
        sc->sc_dma_alloc = NULL;
        sc->sc_dma_free  = NULL;
        sc->sc_dma_setup = NULL;
        sc->sc_dma_start = NULL;
        sc->sc_dma_poll  = NULL;
        sc->sc_dma_eop   = NULL;
        sc->sc_dma_stop  = NULL;
        sc->sc_intr_on   = NULL;
        sc->sc_intr_off  = NULL;

        /*
         * Support the "options" (config file flags).
         * Disconnect/reselect is a per-target mask.
         * Interrupts and DMA are per-controller.
         */
#if 0
        flags = 0x0000; /* no options */
#else
        flags = 0xffff; /* all options except force poll */
#endif

        sc->sc_no_disconnect = (flags & NCA_NO_DISCONNECT);
        sc->sc_parity_disable = (flags & NCA_NO_PARITY_CHK) >> 8;
        sc->sc_min_dma_len = MIN_DMA_LEN;

        error = nca_pcmcia_enable(self, 1);
        if (error)
                goto fail;

        sc->sc_adapter.adapt_enable = nca_pcmcia_enable;
        sc->sc_adapter.adapt_refcnt = 1;

        ncr5380_attach(sc);
        scsipi_adapter_delref(&sc->sc_adapter);
        esc->sc_state = NCA_PCMCIA_ATTACHED;
        return;

fail:
        pcmcia_function_unconfigure(pf);
}

int
nca_pcmcia_detach(device_t self, int flags)
{
        struct nca_pcmcia_softc *sc = device_private(self);
        int error;

        if (sc->sc_state != NCA_PCMCIA_ATTACHED)
                return 0;

        error = ncr5380_detach(&sc->sc_ncr5380, flags);
        if (error)
                return error;

        pcmcia_function_unconfigure(sc->sc_pf);

        return 0;
}

int
nca_pcmcia_enable(device_t self, int onoff)
{
        struct nca_pcmcia_softc *sc = device_private(self);
        int error;

        if (onoff) {
                /* Establish the interrupt handler. */
                sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_BIO,
                    ncr5380_intr, &sc->sc_ncr5380);
                if (sc->sc_ih == NULL)
                        return EIO;

                error = pcmcia_function_enable(sc->sc_pf);
                if (error) {
                        pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
                        sc->sc_ih = 0;
                        return error;
                }

                /* Initialize only chip.  */
                ncr5380_init(&sc->sc_ncr5380);
        } else {
                pcmcia_function_disable(sc->sc_pf);
                pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
                sc->sc_ih = 0;
        }

        return 0;
}